NS0-502: NCIE-SAN 7-ModeDemo

By Netapp · Question Mode

QuestionQ9

SAN concepts

A 100-GB thinly provisioned LUN is assigned to a Windows host. After 100 GB of data is written to the LUN, capacity utilization on both the disk array and the host is 100%. Then, 50 GB of data is deleted from the LUN. Space Reclaimer has not been run.

What is the current capacity utilization on the host and on the disk array?

  • A 50% on the host, 100% on the disk array
  • B 100% on the host, 50% on the disk array
  • C 50% on the host, 50% on the disk array
  • D 100% on the host, 100% on the disk array
Explanation

Deleting data updates the host file system’s free-space accounting, leaving 50 GB used on the 100-GB LUN. Thin-provisioned array blocks that were previously allocated remain allocated until a reclamation operation, such as SCSI UNMAP, informs the array that the blocks can be released; therefore, array utilization remains 100%.

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